CBSE
Multiple Choice QuestionsWhich of the following tissues consist of living cells?
Vessels
Tracheids
Companion cell
Sclerenchyma
Which of the following plant cells is not surrounded by a cell wall?
Root hair cell
Stem hair cell
Gamete cell
Bacterial cell
Which of the following cell organelles stores hydrolytic enzymes?
Centriole
Lysosome
Chromoplast
Chloroplast
The thickness of unit membrane is
20 Ao
35 Ao
55 Ao
75 Ao
The powerhouse of cells is first discovered by
C Benda in 1897
Kolliker in 1850
Claude in 1880
Kingsburg in 1882
During chloride shift or Hamburger phenomenon, when the whole blood is saturated with CO2, following changes occurs. Which one of them is not correct?
Bicarbonate content of plasma and corpuscles increase
Chloride content of plasma diminished and that of the cell is increased
Total base of blood remain unchanged
Water content and volume of corpuscles decrease
The Sub-units of 80S ribosome will be
40S, 40S
60S, 40S
60S, 20S
55S, 25S
Match the following column I and II for organismic respiration.
| Column I | Column II |
| A. Respiration in bacteria | 1. Mitochondria |
| B. Respiration in cyanobacteria | 2. Cytoplasmic membrane |
| C. Respiration in eukaryotic cell | 3. Mesosomes |
A-2, B-3, C-1
A-3, B-2, C-1
A-1, B-3, C-2
A-3, B-1, C-2
Ribosomes are particles about 200 Å units in diameter consisting of protein and RNA. The percentage of protein and RNA is respectively
80% and 20%
60% and 40%
50% and 50%
40% and 60%
Which of the following sequences represent a possible pathway in the production of a secretory protein?
Rough ER → Secretory vesicle → Ribosome → Golgi apparatus
Ribosome → Rough ER → Golgi apparatus → Secretory vesicle
Secretory vesicle → Golgi apparatus → Ribosomes → Rough ER
Rough ER → Ribosomes → Secretory vesicles → Golgi appratus
